Extension-slide.



G. U. KIMMEL.

EXTENSION SLIDE.

APPLIOATIONYI'ILED JAN. 17, 1.914.

Patented July 7, 191i witnesses fi/Z/ yam M 7/ 311W THE NORRIS PETERS L(J.. PHUTU-LIIHUH WASHINGTON. D. C.

GEORGE C. KIMMEL,

or CINCINNATI, OHIO, ASSIGNOR TO THE CINCINNATI GRINDER,

COMPANY,OF CINCINNATLwOHIO, A CORPORATION OF OHIO.

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Specification. of Letters Patent. Patented J 1y *7 1914 Application filed January 17, 1914. 'Serial No. 812,670.

To all whom/ it may concern Be it known that I, GEORGE G. KIMMEL,

a citizen of the United States, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Improved Extension-Slide, of which the following specification is a full disclosure.

1 My invention pertains to certain new and useful improvements in machine tools, and relates more particularly to the reciprocating work supporting table and its slideways.

provide cover-plates for the slide-ways mounted in extensible relation with the table and adapted to be withdrawn therefrom to form a protecting cover for said slide-ways.

Another object is to provide stop members for the cover-plates adapted to engage the table supporting carriage to limit the move ment of said cover-plates in one direction.

Another object is to provide restraining mechanism mounted upon the supporting carriage and adapted to be engaged by thestop members yieldingly to restrain the cover-plates against movement during a part of the return travel of the table.

Other novel features of construction and arrangements of parts are made apparent by the accompanying drawings which, while illustrating a preferred form of embodiment. of this invention, are only intended to present to those skilled in this art the underlying principles thereof, that they may em-- ploy them in the numerous modifications contemplated within the scope of theclaimsr These drawings have been annexed as a part of this disclosure, like characters of reference denoting corresponding parts throughout the several figures, of which Figure 1 is an end view of the traveling table of a machine tool showing my pro posed mechanism applied thereto. Fig.2 is a section on line 22 of Fig. 1, showing the position of the cover-plates during the forward or left hand travel of the table. Fig. 3 is a detail view of the restraining mechanism, showing it rocked against its spring tension by the return travel of the stop member, and Fig. 4 is a similar View showing the gravity wipe-pawl tripped by the forward travel of the stop member.

Continuing now to describe the illustrated adaptation of this invention it will be pre- One of the objects of this invention is to liminarily stated that the traveling tableA 1s adapted to reciprocate upon slide-ways, 1 and 2 of a supporting carriage B which may bestationary or movable as the particular machine to which it is applied may require.

It has been found that chips and grindings resulting from the tooling or grinding operations of machine tools are injurious to frictional bearing surfaces and especiallyto slide-ways such as are shown in the drawings and when the table is of considerable weight, therefore the main object in view duringthe' conception of this invention has been to design means for protecting said slide ways during their exposure caused by the table travel. 4,

In its preferred form I have shown the carriage B as provided with a flat slideway 1 and a V-slide-way 2, upon which the table A travels. Toward either side of the table, directly abovethe slide-ways land 2, I form apertures 3 and 4 which provide clearance for the cover-plate G and D. Secured to the end of the table are guideplates 5 and 6, which are slotted to receive the cover-plates and to provide a snug fit therebetween to cause the table and cover plates to move as a unit except'when said cover-plates are restrained against movement by other means.

Projecting downwardly from the. outer ends of the cover-plates are stop members 7 and 8 and immediately below is a restrain ing device which is mounted on a bracketi) secured to the carriage B and which is constructed as follows: Journaled in the bracket 9 is a rock-shaft 10 to which is secured a swinging frame 11 having trunnions 12 carrying gravity wipe-pawls 13 which. are

positioned approxlmately coincident to the center line of the slide-ways. The lower weighted end 14 of the wipe-pawls contact with the projecting ends of the rock-shaft 10. The wipe-pawls havea free counter-1 clockwise movement and are restricted in "an opposite direction, when engaged by the cover plate, by the rock-shaft 10 with the pawl. and frame when thus engaged, swing ing as a unit. I

Within a recess 15 having a protecting cover 16, a spring 17 is coiled around the shaft 10, and exerts a counter-clockwise tension upon the frame 11 by reason-of its ends bearing against the under sides of the I bracket 9 and protecting cover 16 of said A v When the table starts "on its return travel;

K from the frame .11 limits its movement in one direction 1 Operation: With reference to 2, let it be assumed that the table A is traveling to,

1 the left. The-stop member 7 is held against movement by the stationary carriage therefore as the table travels to the left, the cover-plate G is withdrawn from'the table to? provide a protection for th slide-Way 1..

the cover plate' travels vwith itas a unit by? 'reasonof its frictional fit within the guidein contactwith the upper end'of 'the wipe-: pawl 13, said member and its cover-plate; ;are broughtto a stop byreason oftheten-' 'sion of the spring 17 being suflicient to over-:

come" the frictional resistance between the guide-plate 5. and the cover-plate O. A con-j tinned return travel of the table 1A brings .'member 7 passing beyond the pawl13 allows the parts to assume their normal position shown in Fig. 2. On the next forward travel of the table the member 7 wipesiby: the Wipe-pawl 13 as shown in Fig. 4. ,If this restraining mechanism were not pro- "vided the length of cover-plate exposed during'the. forward travel of'the table (which may'at times be one half the length of the A -table)"would upon the return travel project beyond the table a considerable distance, thereby requiring fully twice as much floor space per machine as is required when such a restraining device is employed. 7

v It will be apparent that my proposed construction amply protects the slide-ways from falling chips and grinding dust without increasing the floor space required for the usual operations of the machine.

Having thus described my invention, I

claim as new and desire to secure by'Letters Patent of the United States y 1, Amachine-tool of the nature disclosed combining a reciprocating table, a slide-way copies of this patent may be obtained for therefor, a cover-plate for said slide-way mounted in' extensible relation with said table, means-for arresting the movement of the'cover-plate in one direction, and means for arresting the movement of the coverplate in the opposite direction until the table ihasreached a predetermined position,

therefor, a cover-plate for said slide-way mounted in extensible relation with said table, means for arresting themovementof the r p v cover-plate in one direction, a member prov plate '5; "VVhen the stop member 7' comes} viding resistance against movement of the cover-plate in the opposit direction relative to thetable and automatic restraining mechanism toovercome said resistance and arrest the movement of the cover-plate relative to the slide-Way until positively moved by the table.

3. A machine-tool of the nature disclosed combining a reciprocating table, a slide-way .therefor, a cover-plate for said slide-way mounted in extensiblerelation to the table, means for arresting the movement of-the cover-plate in one direction, a member p'roviding resistance against movement ofthe cover-plate in the opposite direction relative tothetable and automatic restraining mechanism to overcome" said'resistanceto arrest my name, as attested by the two subscribing Witnesses. I 1

GEORGE C. KIM'MEL.

" Witnesses: y 1

OLIVER B. KAISER, 'LoUIsE. A. -BECK.

five cents each, by addressing the Commits-loner 0! Patents, z wash lngtonfl li G.

, In witness whereofplI hereunto-subscribe 

